From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-yh0-f45.google.com (mail-yh0-f45.google.com [209.85.213.45]) by kanga.kvack.org (Postfix) with ESMTP id C7B176B0035 for ; Wed, 11 Dec 2013 00:28:01 -0500 (EST) Received: by mail-yh0-f45.google.com with SMTP id v1so4620572yhn.4 for ; Tue, 10 Dec 2013 21:28:01 -0800 (PST) Received: from mail.zytor.com (terminus.zytor.com. [2001:1868:205::10]) by mx.google.com with ESMTPS id v3si16423852yhd.238.2013.12.10.21.28.00 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 10 Dec 2013 21:28:00 -0800 (PST) In-Reply-To: <52A7EC9B.2080209@huawei.com> References: <52A6D9B0.7040506@huawei.com> <52A7C16A.9040106@huawei.com> <52A7D415.6010908@zytor.com> <52A7E223.9030605@huawei.com> <52A7E3E5.2010609@zytor.com> <52A7EC9B.2080209@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Subject: Re: [PATCH] mm,x86: fix span coverage in e820_all_mapped() From: "H. Peter Anvin" Date: Tue, 10 Dec 2013 21:27:16 -0800 Message-ID: <64518090-daf1-4382-8a9e-c56e55bfbd7b@email.android.com> Sender: owner-linux-mm@kvack.org List-ID: To: Xishi Qiu Cc: Yinghai Lu , Thomas Gleixner , Ingo Molnar , the arch/x86 maintainers , Linn Crosetto , Pekka Enberg , LKML , Andrew Morton , Linux MM Is that an actual requirement of the API? Xishi Qiu wrote: >On 2013/12/11 12:02, H. Peter Anvin wrote: > >> On 12/10/2013 07:55 PM, Xishi Qiu wrote: >>> >>> I think there is a problem. >>> e.g. >>> [start, end)=[8, 12), and [A, B)=[0, 10), [B, C)=[10,20), >>> then e820_all_mapped() will return 1, it spans two regions. >>> >> >> Why is that a problem? >> > >[start, end) should be included in one region ? > >Thanks, >Xishi Qiu > >> -hpa >> >> >> >> -- Sent from my Android phone with K-9 Mail. Please excuse my brevity. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org